Antenna Element Layout for Reflection Phase Control
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Solution Overview
Problem
Conventional antenna designs face challenges with reduced amplitude of electromagnetic waves due to 180° phase-shifting reflections from metal conductors, which can be mitigated by using artificial magnetic walls, but these solutions have limitations in efficiency and design complexity.
Innovation Solution
The proposed solution involves an antenna element with a conductor part, ground conductor, and feeding lines, utilizing a dielectric material and conductive materials to create an artificial magnetic conductor character, reducing phase difference between incident and reflected waves, and incorporating a filter connected to the feeding lines to enhance radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is positioned close to a metal conductor, then the antenna size is reduced, but the amplitude of radiated electromagnetic waves is reduced due to 180° phase-shifted reflections
Solution Approach 1:
The patent converts the harmful 180° phase-shifted reflections from metal conductors into beneficial 0° phase-shifted reflections by introducing an artificial magnetic conductor structure. This structure includes a ground conductor and connection conductors arranged to transform the reflection characteristic, allowing the antenna to be positioned close to the metal conductor without amplitude reduction while maintaining compact size
2Loss of energy
If conventional artificial magnetic wall techniques are used to reduce reflected wave influence, then radiation efficiency is improved, but device complexity increases
Solution Approach 1:
The ground conductor in the patent serves multiple functions simultaneously: it acts as a reference plane for the antenna, provides the artificial magnetic conductor effect to control reflections, and serves as a shielding layer. This multi-functionality reduces the need for additional separate components, thereby improving radiation efficiency while minimizing device complexity
Solution Approach 2:
The patent merges the ground conductor and the artificial magnetic conductor structure into a single integrated component. By combining these functions into one structure with connection conductors linking the ground conductor to the antenna support, the design achieves efficient reflection control without requiring separate artificial magnetic wall structures, thus reducing overall device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively maintains radiation efficiency by minimizing the impact of reflected waves, allowing for downsized antenna elements and arrays that improve performance and reduce design complexity.
Implementation Method 1
Electromagnetic waves radiated from an antenna are reflected by a metal conductor. The electromagnetic waves reflected by the metal conductor are phase-shifted by 180°.
Implementation Method 2
The electromagnetic waves reflected by the metal conductor are phase-shifted by 180°. The reflected electromagnetic waves are synthesized with electromagnetic waves radiated from the antenna.
Data Source
AI summary
An antenna element includes an antenna and a filter. The antenna includes a conductor part, a ground conductor, three or more first connection conductors, a first feeding line, and a second feeding line. The conductor part extends along a first plane and includes a plurality of first conductors. The ground conductor is positioned separately from the conductor part and extends along the first plane. The connection conductors extend from the ground conductor toward the conductor part. The first feeding line is electromagnetically connected to the conductor part. The second feeding line is configured to be electromagnetically connected to the conductor part at a position different from a position of the first feeding line. The filter is configured to be electrically connected to at least one of the first feeding line and the second feeding line. The filter is positioned to be overlapped with the ground conductor.